Automatic APRS Waypoint Entry with Kenwood TH-D7 and Garmin GPS Devices

Dec 05, 2025

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This guide explains how to enable automatic APRS waypoint entry using the Kenwood TH-D7 hand-held radio with Garmin GPS devices such as the Garmin GPS 12 and GPS III+. When connected, these devices can display APRS position data through the NMEA string '$GPWPL'. Example outputs such as '$GPWPL,5346.17,N,00030.15,W,M1BLR.*5C' illustrate the format of incoming positions that will be saved as waypoints. Note that while APRS symbols may look the same on devices, they are not transferred.

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Automatic APRS Waypoint Entry with Kenwood TH-D7 and Garmin GPS Devices

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D700//D7A GPS jack TM-D700 menu: APRS: WAYPOINTS: 9 CHARACTER NMEA Automatic Waypoint Entry When connected to the Kenwood TH-D7 hand-held, the Garmin GPS 12 and Garmin GPS III+ support the automatic entry of APRS position data onto their displays. The NMEA string '$GPWPL' is output by the Kenwood TH-D7 - as shown in the examples below: $GPWPL,5346.17,N,00030.15,W,M1BLR *5C $GPWPL,5342.91,N,00027.05,W,N TOWE*36 $GPWPL,5344.03,N,00025.68,W,G0VRM*6B Incoming positions from the Kenwood TH-D7 are marked as a 'WAYPOINT'. Although the APRS symbols may appear similar to those of the GPS III+, they are not transferred. (The numbers following the '*' at the end of NMEA strings are checksums.)